Question

what type of reaction is the following: bacl₂ + 2ki -> 2kcl + bai₂
options: single replacement, combination, combustion, decomposition, double replacement

Explanation:

The reaction is \( \text{BaCl}_2 + 2\text{KI}
ightarrow 2\text{KCl} + \text{BaI}_2 \). In a double - replacement reaction, the cations and anions of two ionic compounds exchange places. Here, \( \text{Ba}^{2 + } \) and \( \text{K}^+ \) exchange anions (\( \text{Cl}^- \) and \( \text{I}^- \)). Single - replacement has one element replacing another in a compound, combination is two or more substances forming one, combustion involves a substance reacting with oxygen, and decomposition is one substance breaking into two or more. So this is a double - replacement (the option with "Double Replacement" if we consider the last partially visible option as that, but from the reaction type, it's double replacement. However, looking at the options, maybe a typo, but the correct type here is double replacement. But if we check the given options, the last one seems to be "Double Replacement" (partially visible as "Derul... eplacement" maybe a typo for "Double Replacement").

Answer:

The correct reaction type is Double Replacement (assuming the last option is "Double Replacement" as the reaction \( \text{BaCl}_2 + 2\text{KI}
ightarrow 2\text{KCl} + \text{BaI}_2 \) is a double - replacement reaction where the ions of the two compounds exchange partners). If we consider the visible options and correct the typo, the answer is the option labeled as "Double Replacement" (the last option in the image, partially visible).